urogenital sinus

noun

plural urogenital sinuses

Definition of urogenital sinus

1 : the ventral part of the embryonic mammalian cloaca that is formed by the growth of a fold dividing the cloaca where the hindgut and allantois meet and that eventually forms the neck of the bladder and some parts of the urinary and reproductive systems

2 : a rare urogenital abnormality in which the urethral and vaginal tracts open into a common channel and share a single opening

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The first known use of urogenital sinus was in 1868

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urogenital sinus

noun

Medical Definition of urogenital sinus

1 : the ventral part of the embryonic mammalian cloaca that is formed by the growth of a fold dividing the cloaca where the gut and allantois meet and that eventually forms the neck of the bladder and some of the more distal portions of the genitourinary tract

2 : a rare urogenital abnormality in which the urethral and vaginal tracts open into a common channel and share a single opening